import type {
  DiscussionPost,
  DiscussionReply,
  DiscussionFilter,
  DiscussionStats,
} from "../pages/common/types/discussion";

class DiscussionService {
  async getDiscussions(
    courseId: string,
    filter?: DiscussionFilter
  ): Promise<{ discussions: DiscussionPost[]; total: number }> {
    // TODO: 替换为实际的 API 调用
    // 模拟 API 调用
    return new Promise((resolve) => {
      setTimeout(() => {
        const mockDiscussions: DiscussionPost[] = [
          {
            id: "1",
            title: "关于进程调度算法的问题",
            content: "在学习进程调度算法时遇到了一些问题...",
            author: {
              id: "student1",
              name: "张三",
              role: "student",
            },
            createTime: "2024-03-15",
            tags: ["进程管理", "调度算法"],
            views: 120,
            likes: 15,
            replies: [],
            isPinned: true,
            aiResponse: {
              content: "这是一个AI生成的回复...",
              createTime: "2024-03-15",
            },
          },
          // 更多模拟数据...
        ];

        resolve({
          discussions: mockDiscussions,
          total: mockDiscussions.length,
        });
      }, 1000);
    });
  }

  async getDiscussion(id: string): Promise<DiscussionPost | null> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve({
          id,
          title: "关于进程调度算法的问题",
          content: "在学习进程调度算法时遇到了一些问题...",
          author: {
            id: "student1",
            name: "张三",
            role: "student",
          },
          createTime: "2024-03-15",
          tags: ["进程管理", "调度算法"],
          views: 120,
          likes: 15,
          replies: [],
          isPinned: false,
        });
      }, 500);
    });
  }

  async addReply(
    discussionId: string,
    reply: Omit<DiscussionReply, "id" | "createTime">
  ): Promise<DiscussionReply> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve({
          id: Date.now().toString(),
          ...reply,
          createTime: new Date().toISOString(),
          likes: 0,
        });
      }, 500);
    });
  }

  async addAIReply(discussionId: string, content: string): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async likeDiscussion(discussionId: string, userId: string): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async likeReply(
    discussionId: string,
    replyId: string,
    userId: string
  ): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async deleteDiscussion(discussionId: string): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async deleteDiscussions(discussionIds: string[]): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async pinDiscussion(discussionId: string): Promise<void> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(resolve, 500);
    });
  }

  async getStats(courseId: string): Promise<DiscussionStats> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve({
          total: 156,
          today: 12,
          pending: 5,
          aiReplyRate: 85,
        });
      }, 500);
    });
  }

  async createDiscussion(
    courseId: string,
    discussion: Omit<
      DiscussionPost,
      "id" | "createTime" | "views" | "likes" | "replies" | "aiResponse"
    >
  ): Promise<DiscussionPost> {
    // TODO: 替换为实际的 API 调用
    return new Promise((resolve) => {
      setTimeout(() => {
        resolve({
          id: Date.now().toString(),
          ...discussion,
          createTime: new Date().toISOString(),
          views: 0,
          likes: 0,
          replies: [],
        });
      }, 500);
    });
  }
}

// 创建默认实例
const discussionService = new DiscussionService();

export default discussionService;
